Structural and functional properties of NiTi shape memory alloys produced by Selective Laser Melting

Due to unique functional and mechanical properties, NiTi shape memory alloys are one of the most promising metallic functional materials. However, the poor workability limits the extensive utilization of NiTi alloys as components of complex shapes. The emerging additive manufacturing techniques provide high degrees of freedom to fabricate complex structures. A freeform fabrication of complex structures by additive manufacturing combined with the unique functional properties (e.g., shape memory effect and superelasticity) provide great potential for material and structure design, and thus should lead to numerous applications. In this review, the unique microstructure that is generated by selective laser melting (SLM) is discussed first. Afterwards, the previously reported transformation behavior and mechanical properties of NiTi alloys produced under various SLM conditions are summarized.

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Effect of laser energy density on the evolution of Ni4Ti3 precipitate and property of NiTi shape memory alloys prepared by selective laser melting

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.159338 ◽

2021 ◽

Vol 869 ◽

pp. 159338

Author(s):

Jie Gan ◽

Longchen Duan ◽

Fei Li ◽

Yusi Che ◽

Yan Zhou ◽

...

Keyword(s):

Energy Density ◽

Shape Memory Alloys ◽

Shape Memory ◽

Selective Laser Melting ◽

Laser Energy ◽

Laser Energy Density ◽

Laser Melting ◽

Niti Shape Memory Alloys

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Effect of process parameters on the phase transformation behavior and tensile properties of NiTi shape memory alloys fabricated by selective laser melting

Additive Manufacturing ◽

10.1016/j.addma.2020.101545 ◽

2020 ◽

Vol 36 ◽

pp. 101545

Author(s):

Xiebin Wang ◽

Jingya Yu ◽

Jiangwei Liu ◽

Liugang Chen ◽

Qin Yang ◽

...

Keyword(s):

Phase Transformation ◽

Shape Memory Alloys ◽

Shape Memory ◽

Tensile Properties ◽

Selective Laser Melting ◽

Process Parameters ◽

Transformation Behavior ◽

Laser Melting ◽

Phase Transformation Behavior ◽

Niti Shape Memory Alloys

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Selective laser melting produced layer-structured NiTi shape memory alloys with high damping properties and Elinvar effect

Scripta Materialia ◽

10.1016/j.scriptamat.2017.11.047 ◽

2018 ◽

Vol 146 ◽

pp. 246-250 ◽

Cited By ~ 33

Author(s):

Xiebin Wang ◽

Mathew Speirs ◽

Sergey Kustov ◽

Bey Vrancken ◽

Xiaopeng Li ◽

...

Keyword(s):

Shape Memory Alloys ◽

Shape Memory ◽

Selective Laser Melting ◽

Damping Properties ◽

Laser Melting ◽

Niti Shape Memory Alloys

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Shape memory response of porous NiTi shape memory alloys fabricated by selective laser melting

Journal of Materials Science Materials in Medicine ◽

10.1007/s10856-018-6044-6 ◽

2018 ◽

Vol 29 (4) ◽

Cited By ~ 16

Author(s):

Soheil Saedi ◽

Sayed E. Saghaian ◽

Ahmadreza Jahadakbar ◽

Narges Shayesteh Moghaddam ◽

Mohsen Taheri Andani ◽

...

Keyword(s):

Shape Memory Alloys ◽

Shape Memory ◽

Selective Laser Melting ◽

Laser Melting ◽

Memory Response ◽

Porous Niti ◽

Niti Shape Memory Alloys

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On the Properties of Ni-Rich NiTi Shape Memory Parts Produced by Selective Laser Melting

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring ◽

10.1115/smasis2012-8040 ◽

2012 ◽

Cited By ~ 15

Author(s):

Christoph Haberland ◽

Horst Meier ◽

Jan Frenzel

Keyword(s):

Additive Manufacturing ◽

Shape Memory ◽

Selective Laser Melting ◽

Functional Properties ◽

Processing Route ◽

Laser Melting ◽

Elementary Processes ◽

Near Net Shape ◽

Manufacturing Technologies ◽

Niti Shape Memory Alloys

Processing of Nickel-Titanium (NiTi) shape memory alloys (SMAs) is challenging because smallest compositional variances and all types of microstructural features strongly affect the elementary processes of the martensitic transformation and thus the functional properties of the material. Against this background, powder metallurgical near net shape methods are attractive for the production of NiTi components. Especially additive manufacturing technologies (AM) seem to provide high potential, although they have received only little attention for processing NiTi so far. This work is the first to report on pseudoelastic properties of additive manufactured Ni-rich NiTi. We show how to establish pseudoelasticity in NiTi samples prepared by the additive manufacturing technique Selective Laser Melting (SLM). Therefore, we analyze phase transformation behavior, mechanical characteristics and functional properties of our materials subjected to different heat treatments. The obtained results are compared to the behavior of conventional NiTi. The presented results clearly indicate that SLM provides a promising processing route for the fabrication of high quality NiTi parts.

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